A company wanting to mine in Tasmania's Tarkine region has denied it barred a shareholder activist from a meeting in Western Australia.

Scott Jordan from the Tarkine National Coalition was in Perth for a meeting of Venture Minerals shareholders.

The meeting was held to discuss capital raising for its mining projects in Tasmania's north-west.

Mr Jordan says he was not allowed into the meeting where he was hoping to ask the company about the environmental impact of its proposals.

"This company alone already has three plans for open cut mines, they're still exploring further and they're reporting back results they believe can be developed into further mines," he said.

"This would be a disaster, if these guys get a foot in the door it would be open cut mines right across the area of the Tarkine."

A company spokesman denies Mr Jordan was barred, saying he only purchased shares last week, too late to qualify as a registered shareholder.

Shareholders backed a bid for a $17 million capital raising plan for the Tasmanian projects.

The company is not concerned about the region's possible heritage listing.

Managing Director Hamish Halliday says there are risks associated with any project.

"We move forward on the basis that the land use area in that part of Tasmania is very much open for mineral exploration and we're very cogniscent of making sure that all requirements are met with regards to, and over and above, environmental assessments."